Methods Stratified sampling methods were used to carry out the prevalence study of maternity and child care for women at child bearing-age in Luochuan County and Bin County.

 
  • 方法采用分层抽样,抽取洛川、彬县育龄妇女入户进行妇幼保健现状问卷调查。
今日热词
目录 附录 查词历史